Here we are going to see solutions of 10 problems that you find in the page "7th grade math worksheets".

Grade 7 math worksheets - Solution

Question 1 :

In a class test containing 15 questions, 4 marks are given for each correct answer and (-2) marks are given for every incorrect answer. James attempts all the questions but only 9 of the his answers are correct. what is his total score?

(A) 26 (B) 24 (C) 15

Solution :

Total number of questions = 15

Number of questions answered correctly by James = 9

Number of questions answered incorrectly by him

= 15 - 9 = 6

For each correct answer he will get +4 marks and for each questions he will get -2 marks.

A shop keeper sells mangoes in two types of boxes,one small and one big. A big box contains as many as 8 small boxes plus 4 loose mangoes. Set an equation which gives the number of mangoes in each small box. The number of mangoes in a big box is given to be 100.

We have two vats each containing 2 mats and 2 cats sat on each of the mats. Each cat wrote 2 funny old hats. On each hat lay thin rats.On each rat perched 2 black bats. How many things are in our vats?

(A) 266 (B) 136 (C) 124

Solution :

Since Number of vats = 2

Number of mats in 1 vat = 2

Number of mats in 2 vats = 2 × 2 = 4

Number of cats on 1 mat = 2

Number of cats on 4 mats = 4 × 2 = 8

Number of funny old hat with 1 cat = 2

Number of funny old hat with 8 cats = 8 × 2 = 16

Number of thin rat on 1 old hat = 2

Number of thin rat on 16 old hats = 16 × 2 = 32

Number of black bats on 1 rat = 2

Number of black bats on 32 rats = 32 × 2 = 64

By adding 64 + 32 + 16 + 8 + 4 + 2, we get

= 126

Hence the answer is 126.

Question 10 :

Express the number 5985.3 in standard form

(A) 5.9853 x 103 (B) 5.9853 x 10-3 (C) 59.853 x 102

Solution :

To write the given decimal in standard form, we have to move the decimal point 3 digits toward left.